Culvert construction

ABSTRACT

a culvert construction particularly useful in Arctic regions wherein a permafrost condition typically prevails is provided by a culvert having an insulating base layer between the culvert and the permafrost, preferably wherein the base layer is of greater width than the width of the culvert. Suitable materials for preparing the insulating base layer are synthetic resin foams such as polyurethane and polystyrene. The culvert construction is useful in Arctic regions where a permafrost condition prevails to inhibit culvert sag and culvert icing.



